I just paid $707.00 for repairs to the air vac system because I was told that "topping it off" can cause gas and air flow problems. I do not top my gas tank off. I may round off to the nearest 10, but I do not top off. My car has only 51,000 miles. I am 53 years old. My contention is if this is a problem with all Toyotas as I was told at the dealership, then a disclosure from Scion/Toyota should be made available and placed on the gas cap or sun visor or the warranty manual - somewhere. Buyers beware!! I am writing to the CEO and President of Scion as well.
Good gas mileage, but my 1991 Toyota Tercel and 1988 Honda Civic were better.
Put disclosure about "topping gas tank off" and possibly creating $700.00 in repairs! This is nonsense. More reason to go solar and hydrogen and get away from this ridiculous gas engine and air flow and computer sensors.